How to find unused packages in package.json?

You can use an npm module called depcheck (requires at least version 10 of Node).

1. Install the module:

    npm install depcheck -g
   
    or
   
    yarn global add depcheck
   

2. Run it and find the unused dependencies:

    depcheck
   

The good thing about this approach is that you don’t have to remember the find or grep command.

To run without installing use npx:

npx depcheck